Hobbywing EZRUN MINI28 30A 2S Sensored Brushless ESC for 1/28 Mini-Z

The Hobbywing EZRUN MINI28 is a compact 30A sensored brushless ESC developed specifically for 1/28 and 1/27 scale Mini-Z-style racing platforms. At only 22.7 × 14.2 × 11.8mm and approximately 5g without wires, it brings race-level throttle, brake and timing adjustment into chassis where both installation space and weight matter.

Designed around 2S LiPo power and 1626-size brushless motors, the MINI28 supports both sensored and sensorless operation, adjustable Boost and Turbo timing, selectable 6V/7.4V BEC output, LCD programming, OTA wireless programming and online firmware upgrades.

For more car-oriented electronic speed controllers, browse our RC Car ESCs or explore the wider Hobbywing ESC collection.

Quick Fit Check

• Part Number: 30101300
• Application: 1/28 and 1/27 scale Mini-Z / micro racing cars
• Motor Type: Sensored or sensorless brushless
• Recommended Motor Size: 1626 class
• Battery: 2S LiPo
• Continuous / Peak Current: 30A / 80A
• BEC: 6V / 7.4V adjustable, up to 3.5A peak, switch-mode
• Size: 22.7 × 14.2 × 11.8mm
• Weight: Approx. 5g without wires
• Waterproof: No

Built Specifically for 1/28 Mini-Z Racing

The MINI28 is not simply a reduced-size general-purpose car ESC. Hobbywing developed its software and hardware around the demands of 1/28 racing, where very small changes in initial throttle response, braking feel and timing can noticeably affect the car through tight technical sections and short straights.

Its small footprint makes it easier to package inside compact Mini-Z-style chassis while leaving more freedom for receiver placement, wiring and weight distribution.

Only About 5g for Space-Critical Micro Builds

With dimensions of just 22.7 × 14.2 × 11.8mm and a bare ESC weight of approximately 5g without wires, the MINI28 is built around the packaging restrictions of micro-scale competition cars.

That low installed mass is useful in a 1/28 chassis where even a few grams can influence overall balance. Its compact shape also reduces the amount of chassis space occupied by the ESC and gives builders more freedom when routing battery, motor and receiver wiring.

30A Power with an Integrated Alloy Heat Sink

Despite its miniature size, the EZRUN MINI28 is rated at 30A continuous current and 80A peak current. A full-alloy heat-sink structure helps move heat away from the electronics without requiring the size and weight of a conventional fan assembly.

The result is a compact power system designed for the high RPM, repeated acceleration and braking cycles typical of indoor micro racing.

Adjustable 6V / 7.4V BEC for Steering Servo Power

The built-in switch-mode BEC can be set to 6.0V or 7.4V with a peak output of up to 3.5A. This gives builders more flexibility when choosing between conventional and compatible high-voltage steering servos.

Always confirm the receiver and servo voltage ratings before selecting 7.4V. A higher BEC setting should only be used when every receiver-side component connected to that supply is designed for the selected voltage.

Two Racing Profiles: Zero Timing and Modified

The MINI28 provides dedicated tuning directions for different classes and power requirements. A Zero Timing configuration can be used where timing assistance is restricted, while the Modified direction opens access to Boost and Turbo settings for racers who need more control over power delivery and straight-line performance.

This makes one ESC suitable for very different driving styles without turning the setup process into a generic one-profile compromise.

Fine-Tune Throttle, Brake, Boost and Turbo

A major advantage of the MINI28 is the depth of its programmable controls. Rather than limiting adjustment to basic punch and brake force, the ESC allows racers to tune key parameters that directly influence how the car behaves through different sections of a track.

Important Adjustable Parameters

• Running mode
• Maximum forward force
• Maximum reverse force
• Low-voltage cutoff
• ESC thermal protection
• 6V / 7.4V BEC voltage
• Motor rotation direction
• Throttle rate control
• Neutral range
• Initial throttle force
• Coast
• PWM drive frequency
• Softening value and range
• Drag brake
• Maximum brake force
• Brake rate control
• Brake frequency
• Boost timing
• Boost activation by RPM or throttle
• Boost start and end RPM
• Turbo timing
• Turbo delay
• Turbo increase rate
• Turbo decrease rate

PWM drive frequency can be adjusted across a broad range, while Boost and Turbo controls allow experienced racers to shape how additional timing is delivered. Aggressive timing can increase motor and ESC temperature, so gearing, motor timing and operating temperature should be checked after meaningful setup changes.

OTA Wireless Programming and Firmware Updates

The MINI28 can be configured through an optional Hobbywing OTA Programmer and the HW Link mobile app. This gives racers a convenient way to change parameters from a phone rather than removing the ESC from a tightly packaged micro chassis.

The OTA Programmer connects through the MINI28's throttle/programming connection using the required transfer lead. It can also be used for supported firmware updates.

You can also browse compatible ESC programming cards and programmers for Hobbywing ESC setup and tuning.

Sensored or Sensorless Brushless Operation

For a sensored setup, the A, B and C motor wires must be connected to the corresponding A, B and C phases on the motor, and the sensor cable must also be connected between the ESC and motor.

If the sensor cable is not connected, the MINI28 can still operate a compatible brushless motor in sensorless mode. With a sensorless motor, phase-wire order is not polarity-sensitive; if the motor rotates in the wrong direction, two motor wires can be exchanged or motor rotation can be adjusted where appropriate.

Product Specifications

Protection Functions

• LiPo low-voltage cutoff protection
• ESC thermal protection
• Throttle signal-loss / fail-safe protection
• Automatic sensorless fallback when an abnormal sensor signal is detected

The MINI28 is not waterproof. Keep the ESC away from water, condensation and conductive debris, particularly in exposed micro chassis.

What to Check Before Installing

• Confirm your vehicle has enough room for the 22.7 × 14.2 × 11.8mm ESC body and wiring.
• Use only a compatible 2S power setup.
• Confirm motor size and load are appropriate for the MINI28.
• For sensored operation, connect A-A, B-B and C-C and install the sensor cable.
• Confirm receiver and servo voltage ratings before switching the BEC to 7.4V.
• Check gearing, timing and temperatures after changing Boost, Turbo or PWM settings.
• Insulate all solder joints to prevent short circuits.

Programming Options

The MINI28 does not rely on the ESC's own SET button or a basic LED program card for advanced parameter programming. Compatible programming options include supported Hobbywing LCD programming hardware and the optional OTA Programmer.

When using the OTA Programmer, the MINI28 uses its throttle cable as the programming connection and requires the appropriate transfer cable. Firmware updates are also supported through compatible Hobbywing programming hardware.

FAQ

Is the Hobbywing EZRUN MINI28 made for Mini-Z cars?

It is designed around 1/28 and 1/27 micro racing applications and is particularly suited to Mini-Z-style builds when the chassis, motor, battery, receiver and wiring layout match the ESC requirements.

Can the MINI28 run on 3S?

No. The published specification for the EZRUN MINI28 is 2S LiPo.

Does the MINI28 support sensored motors?

Yes. It supports sensored brushless operation. The A/B/C phase wires must be connected in the correct corresponding order, and the sensor cable must be installed for sensored operation.

Can it run a sensorless brushless motor?

Yes. The MINI28 also supports sensorless brushless operation.

What is the MINI28 BEC output?

The switch-mode BEC can be adjusted between 6.0V and 7.4V and is rated for up to 3.5A peak output.

Does the MINI28 support Boost and Turbo timing?

Yes. The ESC includes adjustable Boost and Turbo timing functions intended for advanced racing setup. Timing changes should be tested carefully because aggressive settings can increase ESC and motor temperature.

Can I program the MINI28 from a phone?

Yes, with the optional Hobbywing OTA Programmer and HW Link app. The OTA hardware is not built into the MINI28 itself.

Is the EZRUN MINI28 waterproof?

No. The MINI28 is not rated as waterproof.

User Manual

For calibration, wiring, programmable parameters, Boost/Turbo setup, LED status codes and troubleshooting, refer to the Hobbywing EZRUN MINI28 User Manual .

Package Includes

• 1 × Hobbywing EZRUN MINI28 ESC, Part No. 30101300
• Wiring / connection hardware supplied with the ESC package
• 1 × User Manual

Important Setup Note

Before calibration or programming, remove the motor pinion or keep the driven wheels safely off the ground. Always disconnect the battery after use. Verify battery polarity, insulate all soldered connections, and monitor ESC and motor temperatures after changing gearing, PWM frequency, Boost timing or Turbo timing.